4 ms·
Not disk drives but tape drives. Most likely these: https://en.m.wikipedia.org/wiki/IBM_729 https://en.m.wikipedia.org/wiki/IBM_729
by jahewson 3y ago
Not disk drives but tape drives. Most likely these:
https://en.m.wikipedia.org/wiki/IBM_729 https://en.m.wikipedia.org/wiki/IBM_729
- gumby 3y agoSABRE was specifically disk drives, though given the capacity of drives in those days I'm sure tapes were very important (and you see a lot of them in the photos from the link I included)
- jahewson 3y agoThis is somewhat mysterious. Sabre launched in 1960 on a pair of of IBM 7090s (a system itself launched only a year prior) but the first HDD compatible with the 7090 was as far as I can tell, the well-known IBM 1301 which didn’t ship until 1962. Perhaps the record size was designed based on the anticipated specs of the 1301? Or perhaps they wrote a new storage layer when they got disks - either way I’m sure as you say they optimized their record size for those very expensive disks.